TUDELLA, Joana; RIBEIRO, Maria Rosario; CRAMAIL, Henri; DEFFIEUX, Alain

doi:10.1002/macp.200600615

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TUDELLA, Joana

RIBEIRO, Maria Rosario

CRAMAIL, Henri

Laboratoire de Chimie des polymères organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers

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Macromolecular Chemistry and Physics. 2007, vol. 208, n° 8, p. 815-822

Wiley-VCH Verlag

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The synthesis of new organo-aluminum derivatives based on the reaction of carboxylic acids with trialkylaluminum and their use as co-catalysts for ethylene polymerization, in the presence of iron catalyst is described. These co-catalysts were obtained through the reaction of acetic acid, benzoic acid, or benzoic acid derivatives with different trialkylaluminums. The most promising co-catalyst was obtained from the reaction of benzene tricarboxylic acid (BTCA) with trimethylaluminum (TMA). The influence of alkylaluminum/BTCA ratio, reaction time, and temperature on the ethylene polymerization activity was investigated. H-1 NMR spectra of some of the most active co-catalysts confirm the formation of alumoxane-type species. Polymerization activities of the same order or even higher to those found using "pure" trialkylaluminums or methylaluminoxane (MAO) co-catalysts were obtained.< Leer menos

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trialkylaluminum

polyethylene

catalysts

benzene tricarboxylic acid

benzoic acid

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Novel organic activators for single site iron catalysts

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